#pragma once
#include <string>
#include <unordered_map>

namespace rpc{
    #define KEY_METHOD     "method"
    #define KEY_PARAMS     "parameters"
    #define KEY_TOPIC_KEY  "topic_key"    
    #define KEY_TOPIC_MSG  "topic_msg"
    #define KEY_OPTYPE     "optype"
    #define KEY_HOST       "host"
    #define KEY_HOST_IP    "ip"
    #define KEY_HOST_PORT  "port"
    #define KEY_RCODE      "rcode"
    #define KEY_RESULT     "result"

    enum class MType{
        REQ_RPC = 0,
        RSP_RPC,
        REQ_TOPIC,
        RSP_TOPIC,
        REQ_SERVICE,
        RSP_SERVICE 
    };

    enum class RCode{
        RCODE_OK = 0,
        RCODE_PARSE_FAILED,
        RCODE_ERROR_MSGTYPE,
        RCODE_INVALID_MSG,
        RCODE_DISCONNECTED,
        RCODE_INVALID_PARAMS,
        RCODE_NOT_FOUND_SERVICE,
        RCODE_INVALID_OPTYPE,
        RCODE_NOT_FOUND_TOPIC,
        RCODE_INTERNAL_ERROR
    };
    static std::string errReason(RCode code){
        static std::unordered_map<RCode, std::string> err_map = {
            {RCode::RCODE_OK, "成功处理"},
            {RCode::RCODE_PARSE_FAILED, "消息解析失败"},
            {RCode::RCODE_ERROR_MSGTYPE, "消息类型错误"},
            {RCode::RCODE_INVALID_MSG, "无效消息"},
            {RCode::RCODE_DISCONNECTED, "连接已断开"},
            {RCode::RCODE_INVALID_MSG, "无效的RPC参数"},
            {RCode::RCODE_NOT_FOUND_SERVICE, "没有找到对应的服务"},
            {RCode::RCODE_INVALID_OPTYPE, "无效的操作类型"},
            {RCode::RCODE_NOT_FOUND_TOPIC, "没有找到对应的主题"},
            {RCode::RCODE_INTERNAL_ERROR, "内部错误"}
        };
        auto it = err_map.find(code);
        if(it == err_map.end()){
            return "未知错误";
        }
        return it->second;
    }

    enum class RType{
        REQ_ASYNC = 0,
        REQ_CALLBACK
    };

    enum class TopicOptype{
        TOPIC_CREATE = 0,
        TOPIC_REMOVE,
        TOPIC_SUBSCRIBE,
        TOPIC_CANCEL,
        TOPIC_PUBLISH
    };

    enum class ServiceOptype{
        SERVICE_REGISTRY = 0,
        SERVICE_DISCOVERY,
        SERVICE_ONLINE,
        SERVICE_OFFLINE,
        SERVICE_UNKNOW
    };
}